Mr Nisman was found dead in the bathroom of his Buenos Aires apartment on January 18, 2015. The death was initially classified as suicide, a verdict his family and friends dismissed as absurd.
Last December, federal judge Julián Ercolini officially ruled that Mr Nisman had been drugged, beaten and murdered, possibly by more than one person. Mr Ercolini also charged Diego Lagomarsino, an IT employee in Nisman’s office, as an accessory to murder.
Mr Lagomarsino was the last person in the apartment and the bullet that killed the prosecutor had been fired by Mr Lagomarsino’s gun, Mr Ercolini said.
That ruling was endorsed last week by Ricardo Sáenz, district attorney for the Buenos Aires Criminal Appeals Cour. The court called on the judge overseeing the case to investigate “with the speed and seriousness that such a grave matter imposes.”
Mr Lagomarsino protested his innocence this week, claiming that the prosecutor had shot himself after being “induced to do so”.
He has so far been charged only with lending the pistol to Mr Nisman.
